Ask Me Everything9

What is a body system?

Organs and tissues that work together in the body are described as systems. For example, all the parts of the digestive system—from the mouth to the stornach, liver, and intestines—play a role in Processing food. Body systems are interdependent, relying on one another in order to function correctly.

Tell me morę: breathing in ... and out

Breathing brings fresh air containing oxygen into the lungs and removes stale air containing carbon dioxide. Lungs do not have muscles, so the diaphragm (a dome-shaped muscle under the lungs) and rib muscles must do the work.

₃nse orga^ns’ , _ose. ars, tongue, and nu

01: Contract and flatten your diaphragm and contract the muscles between your ribs. This will increase the space in your chest cavity.

Windpipe.

02: Your lungs will expand to fili the space, sucking in oxygen-rich air through your nose and down your throat and windpipe.

01: Integumentary:

skin, hair, and nails

02: Muscular: muscles 03: Skeletal: bones

04: Cardiovascular:

heart and blood vessels

05: Respiratory:

breathing organs

06: Digestive:

food-processing

organs

07: Reproductive:

sex organs

08: Lymphatic and immune: fluid draining and disease defense

09: Nervous: brain and body control

10: Urinary: waste removal

11: Endocrine: hormone production

03: In your lungs,the oxygen passes into your bloodstream, so it can travel to your heart to be pumped around the body with a supply of oxygen for cells.

WEIRD OR WHAT?

You had morę bones when you were bom than you do now. Babies have around 300 bones, but as you grow, some, such as those in your skuli, fuse together.

650

The number of skeletal muscles in the body

30 ft

(9 m) The combined length of organs in the digestive system

206

The number of bones in an adult’s body

320

The number of movable and semi movable joints in the body

(c) 2011 Dorling Kindersley. All RiJ

Every minutę when not exercising, you breathe in and out

about 3,370 in³ (6 liters) of air.

Exhaled air contains around 100 times the concentration

of carbon dioxide than

the air that is breathed in.

What about me?

^    a \7pssels were laid end.

^endlheywouldstretch around

^W Si mo and a tralf times.